You need roughly 75,000 experience points to reach level 10. It seems aunting at first but it really doesn't take long especially if you use the recommended method of grinding:

Mode: Perfectionist
Map: Arc of Triumph
Perfectionist mode is trying to to do the best possible lap from ground zero. Meaning every lap it resets the amount of boost you have along with the shortcut tokens. The idea is to do as many tricks in the eight minutes allotted as possible. The more tricks you do the more experience you get. Just for tricks alone I could get around 2,500 experience plus a little extra depending on my placing with maximum earnings of 500 experience for first place. You get experience upto 6th place - anything less and your relying on how many tricks you pull off. Using this method this achievement shouldn't take more than thirty games.